Gasket.



. PATENTED JUNE 18, 1907.

B. A. WILGOX.

GASKET. APPLIoATIoN FILED APB.2s.1soe.

n A h 7 Ww. QM,

. UNITED STATES PATENT OFFICE.

ne. stares.

Specification of Letters Patent.

Application led April 23, 1,906. Serial No. 313.268.

To if/Z whom/tmay concern:

Be it known that I, ELME'R A. WrLeoX, a citizen of 'the United States,residing in Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Gaskets, of which the followingis a specification.

ln my application for patent, Serial No. 288,158, filed November28,-1905, since pat# ented in Patent N o. 836,950, dated Nov. 27, i906,l show and describe a flat packing ring. or gasket for the joints ofVpipes made from soft sheet metal bent or spun so as toform between thefolds of the metal an annular interior channel or passage. This channelcommunicates with the interior of the pipe, thus admitting the steam orother fluid therefrom, and enabling the ilu'id to. act expansively onthe walls of the channel and to maintain the tightness of the Joint.

My present invention is a carrying forward of this idea of utilizing thesteam or other pressure existing in the pipe as a means ofexanding thegasket, and it consists ofa gashet or packing ring made of soft metaland bent into U. form in cross section placed between the opposingflanges ofthe parts united by the joint and compressed thereby, thespace between the folds of the rim being filled with an elastic packing,which maybe either rubber, paper, fibrous materialor otherl suitf,

able substance, theopen side ofthe ringbeing presented to the steam orfluid in the pi e so that the pressure will be exerted u on t e fillingmaterial and act thr ugh sai filling material to expandthe metal ringand-keepl its sides in close contact withthe parts of the 'oint I JThenature lof my inventi n is .fully set forth below, and is also illustated in the accompanying drawing, in which latter Figure 1 is a sectionofa joint provided with my improved packing. Fig. 2 is a plan .view ofthe gasket, and Fig. 3 is a transverse section of the same.

'In said drawing, 5, 5 represent united sectionsof a pipe, each beingprovided with a flange 6, 6 through which the bolts 7, 7 may be passed.The gasket is shown at 8, and 1s arranged between said flanges andcompressed thereby' and consists of an endless ring of flat copperdoubled so that it is U form in cross section, the4 open side of thePatented June 1s, 1907. I

ring being upon its interior, and'a filling 9 in- A serted in the U-shaed ring'at the o en side and substantially ling 'the space etween thewalls of the ring, andacting to revent the total collapse of the ringunder t e pressure (put upon it bythe bolts 7 'and which woul deprivethe ring of its elasticity. The compression on the ring insuresconformity by it to the roughnesses or other imperfections of theopposing faces of the joint, and

prevents leaking of the steam between lthe outside of the'rin'g and thefaces by closing the avenues of esca e which would'otherwise be foundthere. T e compression is also Afelt by the lling. This fillin be of anelastic nature, an it preferably extends inward beyond the edges of themetal material should ring, as shown, so that the inner edges of the lmetal will .not become bent in any manner a t to close the open side ofthe ring. With l t 's construction, the expansive force ofthe steam orother fluid' in the pipe presses against the filling and lforces it intothe ring and' causes it to expand the latter, .the internal vpressurefrom the pipe reinforcing the nat ural elasticity of the filling, and asthe pipe cplols and the' internal pressure is withdrawn t e pansive orcesufficiently to maintain close pontact between the ring and the opposingaces.' .l

WhileI have shown the invention as applied to ya pipe joint', it will beunderstood 1t may be used in other steam or fluid joints, havingopposing faces adapted to compress the vin a manner similar to thatshown. v

I clalmzy 1. The combination-With the parts of a vwill still continue toexert its ex-l steam or similar joint, ha 'Y 'opposing faces or flangesas shown, of an en ess ring Insert- `ed between the faces' or iiangesand compressed thereb such ring being made of soft metal and U s ape incross section, withthe open side or edge toward the axis of the jointand the space Within the ring being fill with an elastic lling..

2: The combinatmn withthe parts of a steam or simila joint, havingopposing faces with an elastic filling projectin 'toward the or flanges.as shown7 of an en less ring insert# axis beyond the inner edges oft ering.

.ed between the faces o1' flanges and comv y pressed bhereb such ringbeing made of soft ELMER A' W ILCO' metal andI U s iape in crosssection, with the Witnesses: A f open side or edge toward the axis ofthe joint, H. LNI. MUNDAY, and the space within `the ring being lledEDW. S. EVARTS.

